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我正在使用Linq-to-sql作为ORM。我写这innerjoin如何摆脱asp.net-mvc中的这个错误?
public IQueryable<Material> FindAllMaterials()
{
var materials=from m in db.Materials
join Mt in db.MeasurementTypes on m.MeasurementTypeId equals Mt.Id
select new { m.Mat_id,
m.Mat_Name,
Mt.Name,
m.Mat_Type };
return materials;
}
但是当我编译此我得到一个错误
Cannot implicitly convert type 'System.Linq.IQueryable<AnonymousType#1>'
to 'System.Linq.IQueryable<CrMVC.Models.Material>'.
An explicit conversion exists (are you missing a cast?)
我失去了一些东西...任何建议....
编辑:
我的sql查询
select M.Mat_id,M.Mat_Name,T.Name as Measurement,M.Mat_Type as Description
from Material as M inner join
MeasurementTypes as T on M.MeasurementTypeId = T.Id where M.Is_Deleted=0
@ nWorx它没有工作... – 2010-04-29 12:47:47
@nWorx我得到了错误'不能初始化类型'CrMVC.Models.Material'与集合初始值设定项,因为它没有实现'System.Collections.IEnumerable'' – 2010-04-29 12:48:32
@nWorx错误'CrMVC.Models .Mater ial不包含ID,Name,Type的定义 – 2010-04-29 12:52:13